[READ] Firmwares are not different. 4MB? Pffft You guys are all acting like little kids fighting about fake Pokemon they got from Action Replay. The 4MB difference between the firmware 2.0 you get from iTunes and the firmware 2.0 you get from elsewhere is the different compression methods. The firmware file itself is compressed then extracted into the iPod. Different compression methods will lead to different file sizes. Both firmware files were in different locations and it would be rational to believe they were treated differently. Relax. They are both official and legitimate.